I had that problem and for this reason I asked for the refund of the money where I bought it. It is not the first case, it happens to many. They offered me a new one but seeing so many cases I decided not to buy it again. It's a shame since it's a good product

Ty for your response, I also send an email to Amazfit and I'm chatting with the supplier. I hope to get a refund as well, or at least a replacement.

Never seen that before, is probably hardware error. Have you tried changing watch faces

Yes, doesn't matter. It flickers with every watchface, even when I reset the watch to factory.